Unfortunately porting a mod from Skyrim to Skyrim SE is far easier than visa-versa. In fact, as far as I know you'd have to start from scratch. You should instead look to Skyrim Scaling Stopper, it's better documented and includes a tonne of mod patches too. Setup is definitely more complicated and some of the patches for mods are for obsolete versions but I personally never play without it.

I am trying to use Automation Tools for TES5Edit but am stuck at a crucial stage. If I can get past that, there's a better chance I'll release this mod for Oldrim, although by then you may feel David Brasher's mod is better